SCULLY WILLIAM P purchased 39.2% of their position (207.44K shares) of PROTHENA CORP PUBLIC LTD CO on the open market

Open‑market purchase worth $2.75M — a major conviction buy. The strongest form of insider conviction signal.

P · 6 purchases

SCULLY WILLIAM P

Filed: 5/2/2025ACC: 0000950170-25-062317

InsiderSCULLY WILLIAM PCIK 1045463

→

IssuerPROTHENA CORP PUBLIC LTD COCIK 1559053

10% Owner

Since Dec 2024

-110.26K

Net shares

Net seller

$2.75M

Total acquired

Open market trades

6B · 0S

Total transactions

637.44K acquired · 747.70K disposed

Non-Derivative Transactions13

Ordinary Shares, par value $0.01 per share

Direct

G · Gift

+430K

Price / share

—

Trade value

—

% of position

54.1%

12/18/2024

794.26K→1.22M

Ordinary Shares, par value $0.01 per share

Direct

P · Purchase

+73.44K

Price / share

$13.93

Trade value

$1.02M

% of position

6.0%

12/18/2024

1.22M→1.30M

Ordinary Shares, par value $0.01 per share

Direct

G · Gift

−681K

Price / share

—

Trade value

—

% of position

52.5%

12/19/2024

1.30M→616.69K

Ordinary Shares, par value $0.01 per share

Direct

P · Purchase

+2K

Price / share

$15.91

Trade value

$31.81K

% of position

0.3%

12/20/2024

616.69K→618.69K

Ordinary Shares, par value $0.01 per share

Direct

G · Gift

−500.00

Price / share

—

Trade value

—

% of position

0.1%

12/20/2024

618.69K→618.19K

Ordinary Shares, par value $0.01 per share

Indirect

G · Gift

−40K

Price / share

—

Trade value

—

% of position

40.4%

12/20/2024

99K→59K

Ordinary Shares, par value $0.01 per share

Direct

P · Purchase

+1.20K

Price / share

$13.37

Trade value

$16.04K

% of position

0.2%

12/31/2024

618.19K→619.39K

Ordinary Shares, par value $0.01 per share

Direct

P · Purchase

+800.00

Price / share

$13.39

Trade value

$10.72K

% of position

0.1%

12/31/2024

619.39K→620.19K

Ordinary Shares, par value $0.01 per share

Direct

P · Purchase

+30K

Price / share

$12.99

Trade value

$389.64K

% of position

4.8%

12/31/2024

620.19K→650.19K

Ordinary Shares, par value $0.01 per share

Direct

G · Gift

−13.20K

Price / share

—

Trade value

—

% of position

2.0%

1/2/2025

650.19K→636.99K

Ordinary Shares, par value $0.01 per share

Direct

G · Gift

−1K

Price / share

—

Trade value

—

% of position

0.2%

1/3/2025

636.99K→635.99K

Ordinary Shares, par value $0.01 per share

Direct

P · Purchase

+100K

Price / share

$12.79

Trade value

$1.28M

% of position

15.7%

1/14/2025

635.99K→735.99K

Ordinary Shares, par value $0.01 per share

Indirect

G · Gift

−12K

Price / share

—

Trade value

—

% of position

20.3%

1/15/2025

59K→47K

Total

Net shares

−110.26K

Net value

$2.75M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares, par value $0.01 per share Direct	12/18/2024	G · Gift	+430K	—	—	54.1%	794.26K	1.22M
Ordinary Shares, par value $0.01 per share Direct	12/18/2024	P · Purchase	+73.44K	$13.93	$1.02M	6.0%	1.22M	1.30M
Ordinary Shares, par value $0.01 per share Direct	12/19/2024	G · Gift	−681K	—	—	52.5%	1.30M	616.69K
Ordinary Shares, par value $0.01 per share Direct	12/20/2024	P · Purchase	+2K	$15.91	$31.81K	0.3%	616.69K	618.69K
Ordinary Shares, par value $0.01 per share Direct	12/20/2024	G · Gift	−500.00	—	—	0.1%	618.69K	618.19K
Ordinary Shares, par value $0.01 per share Indirect	12/20/2024	G · Gift	−40K	—	—	40.4%	99K	59K
Ordinary Shares, par value $0.01 per share Direct	12/31/2024	P · Purchase	+1.20K	$13.37	$16.04K	0.2%	618.19K	619.39K
Ordinary Shares, par value $0.01 per share Direct	12/31/2024	P · Purchase	+800.00	$13.39	$10.72K	0.1%	619.39K	620.19K
Ordinary Shares, par value $0.01 per share Direct	12/31/2024	P · Purchase	+30K	$12.99	$389.64K	4.8%	620.19K	650.19K
Ordinary Shares, par value $0.01 per share Direct	1/2/2025	G · Gift	−13.20K	—	—	2.0%	650.19K	636.99K
Ordinary Shares, par value $0.01 per share Direct	1/3/2025	G · Gift	−1K	—	—	0.2%	636.99K	635.99K
Ordinary Shares, par value $0.01 per share Direct	1/14/2025	P · Purchase	+100K	$12.79	$1.28M	15.7%	635.99K	735.99K
Ordinary Shares, par value $0.01 per share Indirect	1/15/2025	G · Gift	−12K	—	—	20.3%	59K	47K
Total			−110.26K		$2.75M

Derivative Transactions0

No derivative transactions reported

Non-Derivative Holdings (Post-Transaction)2

Ordinary Shares, par value $0.01 per share

Indirect

Shares owned75.95K

Ordinary Shares, par value $0.01 per share

Indirect

Shares owned68K

Total

143.95K indirect143.95K

Security Title	Shares Owned	Ownership Type
Ordinary Shares, par value $0.01 per share	75.95K	Indirect
Ordinary Shares, par value $0.01 per share	68K	Indirect
Total	143.95K	143.95K indirect

Derivative Holdings (Post-Transaction)0

No derivative holdings reported